void setup() {
  // put your setup code here, to run once:
}

void loop() {
  // put your main code here, to run repeatedly: 
  unsigned int i;
  asm volatile(
    "addi x16,x16,1;"
  );
  
  for (i=0;i<10;i++) {
    asm volatile(
      "nop;"
    );
  }
}
